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pub fn foo(params: Option<&[&str]>) -> usize {
params.unwrap().first().unwrap().len()
}
fn main() {
let name = "Foo";
let x = Some(&[name]);
let msg = foo(x);
//~^ ERROR mismatched types
//~| expected enum `Option<&[&str]>`
//~| found enum `Option<&[&str; 1]>`
//~| expected `Option<&[&str]>`, found `Option<&[&str; 1]>`
assert_eq!(msg, 3);
}
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